title: Improvement of spatial resolution of keyhole effect images.
abstract: An algorithm is proposed which improves the spatial resolution of difference or effect images acquired with a keyhole sampling strategy. This new reconstruction algorithm uses a priori information about sharp structures in the observed signal changes from a high resolution reference scan. The potential of this algorithm even being able to deal with noisy effect images is illustrated by application to functional MRI data.
authors.affiliation: Radiologische Klinik, Universität Freiburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Oesterle
authors.forename: J
authors.initials: J
authors.lastname: Hennig
mesh_terms: D000465:Algorithms; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009044:Motor Cortex / Q000033:anatomy & histology / Q000502:physiology; D019047:Phantoms, Imaging